Class.js

class.js is a javascript library for prototype based inheritance.

You can grab it, fork it and do whatever you want at github (https://github.com/flodev/class-js).

It is mostly inspired by javascriptMVC class.js.
I changed the interface so that it fits my own needs.

Features

• namespaces
• constructor method
• inheritance
• call parent with _super()
• static methods
• private methods
• optional use of $.Interface

Dependencies

• jquery
• jasmine for running the tests

Examples

$.Class('TestClass',
{
    // constructor method
    init: function() {
        console.log("constructor");
    },

    // static methods will be defined with $ prefix
    $staticMethod: function() {
        console.log("hi I'm static");
    },

    // private methods will be defined with _ prefix
    _privateMethod: function() {
        console.log("i'm private and can only be called by instance methods");
    },

    // normal public method which calls the private method
    publicMethod: function() {
        console.log("I'm public");
        this._privateMethod();
    }
});

TestClass.staticMethod();

var test = new TestClass();
test.publicMethod();
// should fail with undefined is not a function
test.privateMethod();

Inheritance example

$.Class('TestClass2',
{
    // just use the keyword extends and pass a function to it
    extend: TestClass,

    // overwrite existing method and call parent with _super()
    publicMethod: function() {
        console.log("Hi I'm public and i call the parent method");
        this._super();
    }
});

var test2 = new TestClass2();
test2.publicMethod();

Interface example

var interface = new $.Interface(
    // interface name
    'NewInterface', 
    // methods which should be implementend
    ['method1', 'method2']
);

$.Class('WrongImplemented',
{
    // pass the interface object to implement property
    implement: interface,

    // method1 provided by interface
    method1: function() {
        console.log("Hi I'm method1.");
    }
});

// throws an Error for not implementing "NewInterface", method2 is missing
var wrong = new WrongImplemented();


$.Class('CorrectImplemented',
{
    // pass the interface object to implement property
    implement: interface,

    // method1 provided by interface
    method1: function() {
        console.log("Hi I'm method1.");
    },

    // method2 provided by interface
    method2: function() {
        console.log("Hi I'm method2.");
    }
});

// everything should went fine
var correct = new CorrectImplemented();